I developed a font with a similar resolution that was not nearly as legible for my Pi Zero with an e-ink screen many years ago. It allowed for similar tooling such as the flipper zero and esp32 marauder projects. I should fire that project up and implement this font…
A 3x5 font does not sacrifice the M or W. H,M,W end up as similar looking characters, but the M has the center pixel one higher, and the W has the center pixel one lower.
> 4x4: Not enough to draw "E", "M" or "W" properly.
However, 5x5 isn't enough to draw "e" properly if you also want lowercase letters to have less height than uppercase, so you need at least 6 vertical pixels. And then that isn't enough to draw any character with a descender properly, so you need at least 7 vertical pixels (technically you should have 8 in order to allow "g" and "y" to have a distinct horizontal descender while still sitting on the baseline, but this is probably an acceptable compromise). And remember that in practice this means you will still need at least 8x6 pixels to draw each character, to allow for a visible gap between letters below and beside them.
I think the `e` looks better in the 'real pixels' example they gave; I find my tends to 'fill in' the space of the top part of the letter, and I suspect in the context of a longer sentence it'd be pretty easy to parse.
(but yeah, it's not quite right, and is especially jarring in the nice, clean, blown up pixels in the top example)
If the author sees this. I think the lower case t would benefit from a pixel above the cross, similar to how the lower case k goes up one more pixel. It looks a lot like the capital T with how it is now. It is very well done though. Thanks for sharing.
One nice use for these tiny fonts is large text in terminals. Unicode now has 2x4 (from Kaypro), 2x3 (from Teletext, TRS-80), and 2x2 mosaic characters. Unicode also has 3x3 large text (from HP terminals) but font and terminal support is limited.
You could do a bit better with a 4x5 font for every characters except M, W, m, and w which would be 5x5 but use the pixels normaly used to separate them from the next character, so every caracters still use the same width.
The 3x2 is fascinating, it's the same resolution as braille, albeit rotated 90 degrees. I wonder if this could become a braille-like system that's both visually and finger-readable.
Note: there are repeat glyphs here like c and o, though the example actually uses a different c somehow. But perhaps repeats are ok given context.
You can get nicer 5x5 fonts amd it was not that uncommon back in the day. 4 wide is not too bad if you make the center of M and W just two pixels inset from top or bottom respectively or borrow the spacing column.
Plenty of systems did it like CP/M on the Spectrum +3 and it looks pretty decent.
I actually thought of this (or a previous similar project? The one posted here seems more recent...) just a few days ago while watching the announcement video for this new DJ device, since it seems to use a 5x5 font: https://driftdj.com/dj-hybrid
Too bad "tiny screens" pretty much do not exist anymore. Screens with hundreds of pixels on each side are very cheap already.
It reminds me people who research "colorizing grayscale photos", which do not exist anymore either (if you want a color photo of someone you met in your life, there probably exists a color photo of that person).
> Too bad "tiny screens" pretty much do not exist anymore. Screens with hundreds of pixels on each side are very cheap already.
Find me a 0.66" OLED display for ~$1 that has hundreds of pixels on each side then.
> It reminds me people who research "colorizing grayscale photos", which do not exist anymore either (if you want a color photo of someone you met in your life, there probably exists a color photo of that person).
What train of thought led you to think people are primarily researching colorising new B&W photos? As opposed to historical ones, or those of relatives taken when they were young? You can take a colour photo of granddad today but most likely the photos of him in his 20s are all in black and white.
If you know a person who is 70 years old, they were 20 in 1975 - color photos existed back then.
Every grayscale photo of someone famous has already been colorized during the past 50 years. If there are only grayscale photos of you, you were probably born before 1900, and all your friends or your children (who might want to colorize your photo) are probably dead, too.
Quick browsing at adafruit.com (or any other similar vendor), reveals plenty of displays that are 128, 240, and 320 pixels wide. At 6 pixels of width per character, that's only 21, 40, and 53 characters wide. Seems quite useful to me.
There are also several 32x32 led panels, which one could imagine needing some text.
Also, this kind of thing is just interesting, regardless of the usefulness.
There exist plenty of reasons to colorize grayscale photos in 2026.
* a huge corpus of historical imagery
* cheaper grayscale cameras + post processing will surely enable all sorts of uses we haven't imagined yet.
* a lower power CCD and post-processing after the fact or on a different device allows for better power budget in cheap drones (etc).
* these algorithms can likely be tuned or used as a stepping stone for ones that convert non-visible wavelengths into color images.
And that's just off the top of my head as someone who doesn't really work with that stuff. I'm sure there are plenty of other reasons I can't think of.
Grayscale cameras are not that much cheaper than color cameras. And if you decided to use a grayscale camera on purpose, you probably do not care about the color information (which would be totally "made up" by the colorizing algorithm).
Also, if there are only grayscale photos of you, you were probably born before 1900, and all your friends or your children (who might want to colorize your photo) are probably dead, too.
What does the existence of a color photograph of my grandmother as an old woman have to do with my desire to colorize a grayscale photo of her as a child? Or colorize the photos of her wedding?
It's a very strange argument to make: there exist some photos therefore other photos may not be colorized!
IIRC the really cheap Casio Organizers/DataBanks of 90's used 5x5 font. And then my ex used something like that on linux in order to fit a ridiculous amount of xterms onto 14" CRT (somewhat absurd feat with her congenital vision defect).
https://chinese.stackexchange.com/questions/16669/lowest-pix...
However, 5x5 isn't enough to draw "e" properly if you also want lowercase letters to have less height than uppercase, so you need at least 6 vertical pixels. And then that isn't enough to draw any character with a descender properly, so you need at least 7 vertical pixels (technically you should have 8 in order to allow "g" and "y" to have a distinct horizontal descender while still sitting on the baseline, but this is probably an acceptable compromise). And remember that in practice this means you will still need at least 8x6 pixels to draw each character, to allow for a visible gap between letters below and beside them.
(but yeah, it's not quite right, and is especially jarring in the nice, clean, blown up pixels in the top example)
Note: there are repeat glyphs here like c and o, though the example actually uses a different c somehow. But perhaps repeats are ok given context.
Plenty of systems did it like CP/M on the Spectrum +3 and it looks pretty decent.
It reminds me people who research "colorizing grayscale photos", which do not exist anymore either (if you want a color photo of someone you met in your life, there probably exists a color photo of that person).
- https://github.com/akavel/clawtype#clawtype
- mandatory "Bad Apple" vid: https://youtu.be/F9k7zW-rIEo
Find me a 0.66" OLED display for ~$1 that has hundreds of pixels on each side then.
> It reminds me people who research "colorizing grayscale photos", which do not exist anymore either (if you want a color photo of someone you met in your life, there probably exists a color photo of that person).
What train of thought led you to think people are primarily researching colorising new B&W photos? As opposed to historical ones, or those of relatives taken when they were young? You can take a colour photo of granddad today but most likely the photos of him in his 20s are all in black and white.
Every grayscale photo of someone famous has already been colorized during the past 50 years. If there are only grayscale photos of you, you were probably born before 1900, and all your friends or your children (who might want to colorize your photo) are probably dead, too.
Bloody hell, warn people before you post things like that.
https://www.crystalfontz.com/product/cfal12856a00151b-128x56... - 128x56
https://www.crystalfontz.com/product/cfag12864u4nfi-128x64-t... - 128x64
There's a whole world of embedded devices with wide varieties of screen resolutions.
There are also several 32x32 led panels, which one could imagine needing some text.
Also, this kind of thing is just interesting, regardless of the usefulness.
* a huge corpus of historical imagery
* cheaper grayscale cameras + post processing will surely enable all sorts of uses we haven't imagined yet.
* a lower power CCD and post-processing after the fact or on a different device allows for better power budget in cheap drones (etc).
* these algorithms can likely be tuned or used as a stepping stone for ones that convert non-visible wavelengths into color images.
And that's just off the top of my head as someone who doesn't really work with that stuff. I'm sure there are plenty of other reasons I can't think of.
Also, if there are only grayscale photos of you, you were probably born before 1900, and all your friends or your children (who might want to colorize your photo) are probably dead, too.
It's a very strange argument to make: there exist some photos therefore other photos may not be colorized!
I would have loved to have seen a sample of the 4x5, not just the 5x5.
I haven't done the pixel-by-pixel deviation checking, but they may be comparable and independently derived!
I can't at all.
But I'm backfilling a lot of information from context, the same way that this works: https://www.dictionary.com/articles/typoglycemia
It would have been much harder to read a series of random words, or another piece of text with a less predictable structure.